Ever wondered how to impress your friends by instantly telling which day of the week any date falls on? Let me take you on a journey through a surprisingly simple mental trick I discovered in a bustling New York café. 🌆 Assign numbers to days and months, add the date, and sprinkle in a clever year code. For example, Christmas 2009: December (4) + 25 + Year Code (4) = 33. Subtract the nearest multiple of 7 (28), and voilà—5 means Friday! 🎉 Leap years? Just tweak January and February’s codes. The shortcut: take the last two digits of the year, divide by 4 (ignore the remainder), add to the digits, and subtract the nearest multiple of 7. The remainder is your weekday code. Isn’t it wild how a bit of math can feel like magic? Try it, and if you spot a flaw or have a twist, let’s debate in the comments! What other date tricks do you know? 🤔✨ #MathMagic #Education #MentalMath